Hypothesis Testing

#1
I have 8 pre-test results and 8 post-test results but nothing identifying who took which test. How can i test to see if the post-test group feels that they are more skilled after my class?
 
#2
There are different ways to test for differences in group-level means (e.g., Chi squared tests) if you're not able or wishing to track changes in individual scores. Good luck!